public void Test_ConvertingToString(SeparatedLine input, string result)
{
//checks ToString
Assert.True(input.ToString() == result);
//checks explicit converter
Assert.True((string)input == result);
}
private static IEnumerable <string> FetchData(Random rnd, IReadOnlyDictionary <int, char[]> dictionary,
int count, int newLineSize)
{
//var sb = new StringBuilder();
//slower for 1Gb file: ~14.6s for StringBuilder, string line by line - ~14.06s
//var newLine = $"{rnd.Next(0, int.MaxValue)}. {new string(dictionary[rnd.Next(0, count)])}";
//allocates ~3Gb (but less, than SB - ~4Gb)
//even with buffer
//Encoding.ASCII.GetByteCount(newLine) - slower than newLine.Length
//We'll assume that in dictionaries we will be within ASCII symbols (in ASCII 1 char == 1 byte)
while (_resultFileSize > 0)
{
//for 1Gb file: 9.422s with that, allocates ~3Gb, but faster because of operations on stack
var separatedLine = new SeparatedLine
{
Number = rnd.Next(0, int.MaxValue), Text = dictionary[rnd.Next(0, count)]
};
_resultFileSize -= newLineSize + separatedLine.GetLength();
yield return(separatedLine.ToString());
}
}